Bobbin



A VFIG 3.

' INVENTOR. @00A/EVA. MORGAN ATTORNEYS' Patented June 1, 1954 BOBBINRodney A. Morgan, East Aurora, to Spaulding Fibre Company,

N. Y., assigner Inc., Tonawanda,

Application July 18, 1952, Serial No. 299,527

6 Claims.

This invention relates to bobbins or spools for Winding thread, yarn andlike filaments. The invention has particular relationship to bobbins orspools of considerable size wherein the central cylindrical or coreportion of the spool and the ends or heads of the bobbin or spoolcomprise separate individually fabricated parts assembled in a rigidmanner to form a unitary bobbin of rigid and durable construction.

Bobbins or spools of the general type here under consideration arewidely used in various phases of the textile industries and areV subjectto quite severe use so that rigidity and strength and long-wearing lifeare primary considerations in the design and construction of bobbins orspools of this class. Another important consideration is dimensionalaccuracy and concentricity of the finished bobbin so that it turns in afree and well-balanced manner when in use. Since these bobbins are usedin great number, economy of manufacture consistent with the desiredstructural properties is an important consideration.

The bobbin of the present invention is novel in design and constructionand possesses an unusual combination of properties which are importantand desirable in a device of this class. In addition to being ofaccurate and highly rigid and durable construction, the bobbin ofthepresent invention is economical to fabricate and assemble and, infinished form, is smooth and free of irregularities or protuberances.Thus the bobbin of the present invention presents no portions which areapt to snag or catch yarn or other laments wound thereon or usedtherewith and will not abrade or otherwise harmfully engage or act uponthe strands of yarn or other filaments or threads with which the bobbinis used.

A further advantage of the bobbin of the present invention resides inthe fact that the qualikties mentioned above, particularly the qualityof rigidity and strength, are attained in a bobbinof extremely lightWeight. It is well known that the abusive and destructive treatmentwhich bobbins or spools of this class are subjected to in use in textilemills and like industries neces- A sitate extremely rigid anddurablebobbin constructions which in the past have usually been attainedonly by expensive design and manufacturing processes, such expense beingan extremely important consideration in view of the great number ofbobbins or spools which are employed in many of the textile arts as aneveryday necessity.

The bobbin of the present invention comprises an assembly which isbrought together in nal form without the necessity for special gagingdevices and still produces a resultant bobbin of uniform and maximummass product accuracy, well within the prescribed tolerances which areconventional in devices of this class.

Other objects and advantages incident to the manufacture and use of thebobbin or spool of the present invention will occur to those skilled inthe art from a consideration of the following specication and theaccompanying drawing which set forth in detail a single practicalembodiment of the principles of the present invention. It will beunderstood, however, that the form thus set forth is by way of exampleonly and that certain mechanical modifications may be made withoutdeparting from the fundamental principles of the present invention andthe scope thereof is not to be considered as limited otherwise and asdefined in the appended claims.

Fig. 1 is a longitudinal cross-sectional View through one form of thebobbin of the present invention;

Fig. 2 is a detailed perspective view of the central barrel orsupporting portion of the bobbin 0f Fig. 1;

Fig. 3 is a fragmentary view of one end of the bobbin of Fig. 1 viewedas in Fig. 1 and showing one of the end plug or bearing members in theprocess of assembly; and

Fig. 4 is a detailed perspective view of one of the end plug or bearingmembers.

Like characters of reference denote like parts in the several figures ofthe drawing and the numeral I0 designates a metallic tubular memberwhich forms the central support for the entire bobbin and is referred toherein as the barrel element. In Fig. 2 barrel element l0 is shown as astraight tubular member in the form in which it is initially assembledwith the other components of the bobbin. The manner in which the ends ofthe barrel element l0 are nally formed during assembly of the devicewill presently appear.

In the fabrication of the bobbin shown herein by way of example, aphenolic resin impregnated paper material is preferably wound firmly andsecurely directly upon barrel element Ill, after the barrel element iscut to length and after certain ears described later herein have beenformed in the barrel element, and this prelimlnary assembly is thenheated to set up the resin. The surface is then ground or otherwisefinished to produce a smooth and continuous cylindrical distinguishedfrom prior art devices wherein the phenolic resin member has beenseparately molded in tubular form.

A pair of disc-like annular end-orhead 4elements I2 and I3 are in thepresentfinstance made.;

from thermo-setting resin material and are provided with centralapertures which seat. snugly over the ends of barrel element Iii and thehead elements I2 and I 3 generally abut the ends-of the phenolic layer II, there being a thin annular gasket or cushioning member betweeneachfof the head elements I2 and I3 andthe adjacent end of the phenoliclayer .l I. These gaskets or sealing rings are designated III .and l5,respectively, in Figs. 1 and 3.

It will be noted that tha-outer end faces-of head elements I2 and AIi!are provided with annular grooves I5 and I1 as shown in Fig. 1 and,subsequent to assembly of the head members I2 and I3 on the ends ofbarrel IiLthe outer ends of the barrel are spun or otherwise formed orupset in a partially curledformation as indicated at l and I9 in Fig.1whereby these end portions of barrel element IB bear firmly against theouter faces of the head elements I2 and I3 with the extreme outer edgeportions of barrel element I0 extending into thegrooves I6 and I1 toprovide smooth finished end surfaces which are not apt to snag or catchupon threads or other filaments and `which present no sharp edges at anypoint.

Before the Vphenolic layer I I` is. wound` upon barrel element I0,thelatter is formed'with inwardly struck ears as shown in Fig. 2.; Suchears comprise'a pairof outer circular rowsY of ears, designated and 2|and `a pair of inner circular rows of ears designated 22 and 23,.Y Itwill be noted that the ears of theouter rows 2Il and 2I are so formedthat theirinner free end portions are directed radially inwardly and tofward the center of the barrelelement I0 where-v as the ears of the innerrows 2.2 and 23 are di-f rected radially inwardly and sothat theirfree-v end portions face toward the ends of the barrel element Ill.v

The ears 20. through 23 are provided for locat ing and securingendbearing or bushing members in the nature of cylindrical plugsdesignated28 and 21. Themanner in which the ears 20 through 23 are die-formed inthe barrel element I0 insures their accurate and-precise locationrelative to each other and relative to the barrel element In generally,so that the disposi-V tion of these ears automatically insures accuratelocation of the end plug or bearing members 26.

and 21 and thus absolutely `assures the maintenance of axial dimensionsof the device in aA simple and economical manner and without thenecessity for any further gaging, locating, or..

The manner in which the end plugor bearing members 26 and 21 areassembled is clearly shown in the detailed view, Fig. 3, wherein endplug member 21v is being pushed into` the interior. vof.

1i barrel element I0. The end plug members 26 and 21 are provided withannular peripheral grooves 28 and 29, respectively. Referring again toFig. 3, the plug 21 will cam its way past the ears 2| of the outer rowbecause of the direction in which those ears face but the inner end ofplug 21 will abut against the free ends of the ears 23 of the adjacentinner row.- At the same time, the ears of the outer row 2l will snapinto groove 29 of plug member 21 and the inner free ends of the ears ofrow 21 will then abut the inner end or shoulder of annular groove 29 asshown clearly in Fig. 1, the plug or bearing member 21 beingthus-secured against axial displacement and..being.insured of accurateaxial location relative to the barrel element It) and, by the sametoken, relative to the entire bobbin assembly: The other end plug orbearing member 26 is assembled in the same manner and the two plug orbearing members 26 and 21 are provided with suitable `central .boresv orapertures for-iassembly upon supporting spindles` -or .shafts ingconventional manner.

It will be .seen/from the. foregoing thatfthei-a metallic barrel elementIii, inthe presentinfv stance formed of aluminum .,tubing, vcompriseswvthe principal structural componentofthefmished bobbin since it vsupportsand .provides .a rigid backing for .element II, retainsthe head yelements I2 and It, provides themeans for seat;-

ing, locating yand retaining-fthe plug or bearing;y

member i I.

of the bobbin is controlled by and stems frontv the barrel element IILThe manner in which the bobbin lof the present invention is constructedpermits -the plug or:- bearing members to.be located-near the outer endsof the bobbin or. even in a position vwhere they protrudebeyondthebobbin properfif der.

sired, since the plug or bearing members vmaybe inserted after theends'of thefbar-rel.. element :are

spun over the head elements and :then will notV` interfere with thespinning'tool .or'the-spinning operation, no matter where fthe-plugsarefulti-- mately located..-

Since. .the ears lare formed in. thebarrel :ele-:, ment I0, thephenolic'tubeV .II-fmay-be: applied.:

subsequently and the plugmembers may bein-.c

serted afterall of the-preliminary;fabricating;v

and assembly operationsggfincluding thez'assem blingand securing of theheadv elements. Inadei l dition to providing the necessary',bearingsfor`rotatably supportingthe bobbin, the plug lmemV bers internallyreinforcenthe aluminum barrel.;A element against-` crushingor; other-1deformation...

and also preventV `loosening 1or:. runspinningf- 'of the endformationsYIll and .i9, since1such loosen-f1. ing.' or unspinn-ing? can .1normally.- only.y ioccur.' with a reduction in `diameterofthe .end.portions-.i

of lthe barrel element l0. What is claimed; isn.

body member, a circular'. series .of internal-.een- .1 trally facingabut1nents;sformed ina :saidubody:

member adjacent each :endthereof,i;andz;a ciracular seriescof internaloutwardly facing .abut-1.A ments formed in. said body;memberainwardlyxofz.:

each of the first two mentioned. seriesof abuter.- ments, an imperforatecontinuous non-metallic:4 outerv surface layer overlying: nsaid tubularbody;

member and terminating short of the opposite,

ends Ithereof y .a pair .l of z head elements providing` 5 radiallyextending annular flanges at the opposite ends of the bobbin, said headelements having central apertures of substantially the diameter of saidbody member to llt snugly thereover 1n substantial abutment with theends of said surface layer element at their inner faces, annular groovesin the outer faces of said head elements concentric with and adjacent tosaid central apertures, the ends of said tubular body member beingformed radially outwardly and thence inwardly toward said grooves toterminate substantially therein, and cylindrical end bearing memberseach having a central bearing opening and an outer peripheral groove,each end bearing member fitting snugly into an open end of said bodymember with its inner end against the abutments of the adjacent innerseries and with the inner shoulder of its peripheral groovesubstantially against the abutments of the adjacent first-mentionedcircular series.

2. In a bobbin, a metallic cylindrical tubular body member, a circularseries of internal centrally facing abutments formed in said body memberadjacent each end thereof, and a circular series of internal outwardlyfacing abutments formed in said body member inwardly of each of thefirst two mentioned series of abutments, a pair of head elementsproviding radially extending annular flanges at the opposite ends of thebobbin, said head elements having central apertures of substantially thediameter of said body member to t snugly thereover, annular grooves inthe outer faces of said head elements concentric with and adjacent tosaid central apertures, the ends of said tubular body member beingformed radially outwardly and thence inwardly toward said grooves toterminate substantially therein, an imperforate continuous outer surfacelayer extending about said tubular body member between said headelements, and cylindrical end bearing members each having a centralbearing opening and an outer peripheral groove, each end bearing memberfitting snugly into an open end of said body member with its inner endagainst the abutments of the adjacent inner series and with the innershoulder of its peripheral groove substantially against the abutments ofthe adjacent first-mentioned circular series.

3. In a bobbin, a metallic cylindrical tubular body member, internalabutments formed in said body member adjacent each end thereof, andother abutments formed in said body member inwardly of said firstmentioned abutments, an imperforate continuous non-metallic outersurface layer overlying said tubular body member and terminating shortof the opposite ends thereof, a pair of head elements providing radiallyextending annular flanges at the opposite ends of the bobbin, said headelements having central apertures of substantially the diameter of saidbody member to llt snugly thereover in substantial abutment with theends of said surface layer element at their inner faces, annular groovesin the outer faces of said head elements concentric with and adjacent tosaid central apertures, the ends of said tubular body member beingformed radially outwardly and thence inwardly toward said grooves toterminate substantially therein, and cylindrical end bearing memberseach having a central bearing opening and an outer peripheral groove,each end bearing member fitting snugly into an open end of said bodymember with its inner end against said other abutments and with theinner shoulder of its peripheral groove substantially 'against theadjacent first-mentioned abutments.

4. In a bobbin, a tubular body member, internal 'centrally facingabutments formed in said body member adjacent each end thereof, internaloutwardly facing abutments formed in saidk body member inwardly of eachof the nrst mentioned abutments, an imperforate continuous nonmetallicouter surface layer bonded to said tubular body member and terminatingshort of the opposite ends thereof, a pair of head elements providingradially extending annular flanges at the opposite ends of the bobbin,said head elements having central apertures of substantially thediameter of said body member to fit snugly thereover in substantialabutment with the ends of said surface layer element at their innerfaces, annular grooves in the outer faces of said head elementsconcentric with and adjacent to said central apertures, the ends of saidtubular body member being formed radially outwardly and thence inwardlytoward said grooves to terminate substantially therein, and cylindricalend bearing members each having a central bearing opening and an outerperipheral groove, each end bearing member fitting snugly into an openend of said body member with its inner end against the adjacentoutwardly facing abutments and with the inner shoulder of its peripheralgroove substantially against the adjacent inwardly facing abutments.

f5. In a bobbin, a tubular body member, internal centrally facingabutments formed in said body member adjacent each end thereof, internaloutwardly facing abutments formed in said body member inwardly of eachof the first mentioned abutments, a pair of head elements providingradially extending annular flanges at the opposite ends of the bobbin,said head elements having central apertures of substantially thediameter of said body member to llt snugly thereover, annular grooves inthe outer faces of said head elements concentric with and adjacent tosaid central apertures, the ends of said tubular body member beingformed radially outwardly and thence inwardly toward said grooves toterminate substantially therein, an imperforate continuous outer surfacelayer extending about said tubular body member between` said headelements, and cylindrical end bearing members each having a centralbearing opening and an outer peripheral groove, each end bearing memberfitting snugly into an open end of said body member with its inner endagainst the adjacent outwardly facing abutments and with the innershoulder of its peripheral groove substantially against the adjacentinwardly facing abutments.

6. In a bobbin, .a tubular body member, internal centrally facingabutments formed in said body member adjacent each end thereof, internaloutwardly facing abutments formed in said body member inwardly of eachof the ilrst mentioned abutments, an imperforate continuous outersurface layer extending about said tubular body member and terminatingshort of the opposite ends thereof, a pair of head elements providingradially extending annular flanges at the opposite ends of the bobbin,said head elements having central apertures of substantially thediameter of said body member to fit snugly thereover in substantialabutment with the ends of said outer surface layer at their inner faces,annular grooves in the outer faces of said head elements concentric withand adjacent to said central apertures, the ends of said tubular bodymember being formech radially outwardly and thenceV inwardly toward saidgrooves toterminate substantially therein, .and cylindricalr end-bearingmembers each having. a.. central bearing opening and an outer`peripheral groove, each end bearing memhet fitting snugly `intovanvopen end'of said body memberY with its. inner endlfagainst the`adjacent outwardly facing. abutments and with the inner shoulderi of.its.' `peripheral 1 groove substantially against 4'chey adjacentinwardly. facing. abutments.

Name Date Wheeler Aug. 9, 1892 Number Number 10 Number 8 Name 1 Date`Elledge Aug. 22,' 191.1 Glaser Oct. 7 ,1 1913 Howsam Mayl 3,1932 BensonSept. 10; 1940 Moss Nov. 9; 1948 Powell Novia, 1949 VlOl'tEIC-:N PATENTSCountry Date Great Britain ;Dec. 3,v 18.75 Great.: Britain Dec.. .9,1948'

